From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail203.messagelabs.com (mail203.messagelabs.com [216.82.254.243]) by kanga.kvack.org (Postfix) with SMTP id 49C636B009D for ; Fri, 19 Feb 2010 11:45:20 -0500 (EST) Message-ID: <4B7EC013.5090704@redhat.com> Date: Fri, 19 Feb 2010 11:45:07 -0500 From: Rik van Riel MIME-Version: 1.0 Subject: Re: [PATCH 02/12] mm,migration: Do not try to migrate unmapped anonymous pages References: <1266516162-14154-1-git-send-email-mel@csn.ul.ie> <1266516162-14154-3-git-send-email-mel@csn.ul.ie> In-Reply-To: <1266516162-14154-3-git-send-email-mel@csn.ul.ie> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org To: Mel Gorman Cc: Andrea Arcangeli , Christoph Lameter , Adam Litke , Avi Kivity , David Rientjes , KOSAKI Motohiro , linux-kernel@vger.kernel.org, linux-mm@kvack.org List-ID: On 02/18/2010 01:02 PM, Mel Gorman wrote: > rmap_walk_anon() was triggering errors in memory compaction that looks like > use-after-free errors in anon_vma. The problem appears to be that between > the page being isolated from the LRU and rcu_read_lock() being taken, the > mapcount of the page dropped to 0 and the anon_vma was freed. This patch > skips the migration of anon pages that are not mapped by anyone. > > Signed-off-by: Mel Gorman Acked-by: Rik van Riel -- All rights reversed. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org